<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webaudio - sandbox</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>
		<audio id="song" preload="auto" style="display: none">
			<source src="sounds/358232_j_s_song.ogg" type="audio/ogg">
			<source src="sounds/358232_j_s_song.mp3" type="audio/mpeg">
		</audio>
		<audio id="skullbeatz" preload="auto" style="display: none">
			<source src="sounds/376737_Skullbeatz___Bad_Cat_Maste.ogg" type="audio/ogg">
			<source src="sounds/376737_Skullbeatz___Bad_Cat_Maste.mp3" type="audio/mpeg">
		</audio>
		<audio id="utopia" loop preload="auto" style="display: none">
			<source src="sounds/Project_Utopia.ogg" type="audio/ogg">
			<source src="sounds/Project_Utopia.mp3" type="audio/mpeg">
		</audio>
		<div id="overlay">
			<button id="startButton">Play</button>
		</div>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webaudio - sandbox<br/>
			music by <a href="http://www.newgrounds.com/audio/listen/358232" target="_blank" rel="noopener">larrylarrybb</a>,
			<a href="http://www.newgrounds.com/audio/listen/376737" target="_blank" rel="noopener">skullbeatz</a> and
			<a href="http://opengameart.org/content/project-utopia-seamless-loop" target="_blank" rel="noopener">congusbongus</a><br/><br/>
			navigate with WASD / arrows / mouse
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

			import { FirstPersonControls } from 'three/addons/controls/FirstPersonControls.js';

			let camera, controls, scene, renderer, light;

			let material1, material2, material3;

			let analyser1, analyser2, analyser3;

			const clock = new THREE.Clock();

			const startButton = document.getElementById( 'startButton' );
			startButton.addEventListener( 'click', init );

			function init() {

				const overlay = document.getElementById( 'overlay' );
				overlay.remove();

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.set( 0, 25, 0 );

				const listener = new THREE.AudioListener();
				camera.add( listener );

				scene = new THREE.Scene();
				scene.fog = new THREE.FogExp2( 0x000000, 0.0025 );

				light = new THREE.DirectionalLight( 0xffffff, 3 );
				light.position.set( 0, 0.5, 1 ).normalize();
				scene.add( light );

				const sphere = new THREE.SphereGeometry( 20, 32, 16 );

				material1 = new THREE.MeshPhongMaterial( { color: 0xffaa00, flatShading: true, shininess: 0 } );
				material2 = new THREE.MeshPhongMaterial( { color: 0xff2200, flatShading: true, shininess: 0 } );
				material3 = new THREE.MeshPhongMaterial( { color: 0x6622aa, flatShading: true, shininess: 0 } );

				// sound spheres

				const mesh1 = new THREE.Mesh( sphere, material1 );
				mesh1.position.set( - 250, 30, 0 );
				scene.add( mesh1 );

				const sound1 = new THREE.PositionalAudio( listener );
				const songElement = document.getElementById( 'song' );
				sound1.setMediaElementSource( songElement );
				sound1.setRefDistance( 20 );
				songElement.play();
				mesh1.add( sound1 );

				//

				const mesh2 = new THREE.Mesh( sphere, material2 );
				mesh2.position.set( 250, 30, 0 );
				scene.add( mesh2 );

				const sound2 = new THREE.PositionalAudio( listener );
				const skullbeatzElement = document.getElementById( 'skullbeatz' );
				sound2.setMediaElementSource( skullbeatzElement );
				sound2.setRefDistance( 20 );
				skullbeatzElement.play();
				mesh2.add( sound2 );

				//

				const mesh3 = new THREE.Mesh( sphere, material3 );
				mesh3.position.set( 0, 30, - 250 );
				scene.add( mesh3 );

				const sound3 = new THREE.PositionalAudio( listener );
				const oscillator = listener.context.createOscillator();
				oscillator.type = 'sine';
				oscillator.frequency.setValueAtTime( 144, sound3.context.currentTime );
				oscillator.start( 0 );
				sound3.setNodeSource( oscillator );
				sound3.setRefDistance( 20 );
				sound3.setVolume( 0.5 );
				mesh3.add( sound3 );

				// analysers

				analyser1 = new THREE.AudioAnalyser( sound1, 32 );
				analyser2 = new THREE.AudioAnalyser( sound2, 32 );
				analyser3 = new THREE.AudioAnalyser( sound3, 32 );

				// global ambient audio

				const sound4 = new THREE.Audio( listener );
				const utopiaElement = document.getElementById( 'utopia' );
				sound4.setMediaElementSource( utopiaElement );
				sound4.setVolume( 0.5 );
				utopiaElement.play();

				// ground

				const helper = new THREE.GridHelper( 1000, 10, 0x444444, 0x444444 );
				helper.position.y = 0.1;
				scene.add( helper );

				//

				const SoundControls = function () {

					this.master = listener.getMasterVolume();
					this.firstSphere = sound1.getVolume();
					this.secondSphere = sound2.getVolume();
					this.thirdSphere = sound3.getVolume();
					this.Ambient = sound4.getVolume();

				};

				const GeneratorControls = function () {

					this.frequency = oscillator.frequency.value;
					this.wavetype = oscillator.type;

				};

				const gui = new GUI();
				const soundControls = new SoundControls();
				const generatorControls = new GeneratorControls();
				const volumeFolder = gui.addFolder( 'sound volume' );
				const generatorFolder = gui.addFolder( 'sound generator' );

				volumeFolder.add( soundControls, 'master' ).min( 0.0 ).max( 1.0 ).step( 0.01 ).onChange( function () {

					listener.setMasterVolume( soundControls.master );

				} );
				volumeFolder.add( soundControls, 'firstSphere' ).min( 0.0 ).max( 1.0 ).step( 0.01 ).onChange( function () {

					sound1.setVolume( soundControls.firstSphere );

				} );
				volumeFolder.add( soundControls, 'secondSphere' ).min( 0.0 ).max( 1.0 ).step( 0.01 ).onChange( function () {

					sound2.setVolume( soundControls.secondSphere );

				} );

				volumeFolder.add( soundControls, 'thirdSphere' ).min( 0.0 ).max( 1.0 ).step( 0.01 ).onChange( function () {

					sound3.setVolume( soundControls.thirdSphere );

				} );
				volumeFolder.add( soundControls, 'Ambient' ).min( 0.0 ).max( 1.0 ).step( 0.01 ).onChange( function () {

					sound4.setVolume( soundControls.Ambient );

				} );
				volumeFolder.open();
				generatorFolder.add( generatorControls, 'frequency' ).min( 50.0 ).max( 5000.0 ).step( 1.0 ).onChange( function () {

					oscillator.frequency.setValueAtTime( generatorControls.frequency, listener.context.currentTime );

				} );
				generatorFolder.add( generatorControls, 'wavetype', [ 'sine', 'square', 'sawtooth', 'triangle' ] ).onChange( function () {

					oscillator.type = generatorControls.wavetype;

				} );

				generatorFolder.open();

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				//

				controls = new FirstPersonControls( camera, renderer.domElement );

				controls.movementSpeed = 70;
				controls.lookSpeed = 0.05;
				controls.lookVertical = false;

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				controls.handleResize();

			}

			function animate() {

				const delta = clock.getDelta();

				controls.update( delta );

				material1.emissive.b = analyser1.getAverageFrequency() / 256;
				material2.emissive.b = analyser2.getAverageFrequency() / 256;
				material3.emissive.b = analyser3.getAverageFrequency() / 256;

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
